Doubt about 'atc' in ipcc registration form...

Hiii

I have recently passed CPT and knowing trying to fill the IPCC form (isn't it toooo complicated ?!!!!)

I want to go for the Complete CA Course thus I am confused about what option to select in the form viz. IPCC and ATC or Only IPCC ...

There is no one who can clear this mystery (!) At my home  ....

Thus Pray provide me ,the correct info about the Form Filling and also the other details about it like Time Ultimatum to register the form , it's correct fees for me as I want to continue with Group 1 of IPCC in this year , etc.

Thus please help me ...

All advice are heartily welcomed in advance by me !